Wrong script runed after install

[chemzqm]

Do you want to request a feature or report a bug?

Should be a bug.

What is the current behavior?

propublish script is runned after I use yarn

This is scripts part of my package.json:

  "scripts": {
    "postinstall": "webpack",
    "prepublish": "webpack --config webpack.prod.js"
  },

If the current behavior is a bug, please provide the steps to reproduce.

Run yarn command

What is the expected behavior?

It should run postinstall script.

Please mention your node.js, yarn and operating system version.

node v6.0
MacOs
yarn 0.15.1

[FLGMwt]

Running prepublish is correct in terms of npm compatibility (see https://github.com/yarnpkg/yarn/blob/master/src/cli/commands/install.js#L736), but you're right, postinstall should also be run immediately before prepublish.

EDIT:
Looking at npm install at https://github.com/npm/npm/blob/8fa75cd0313e3cea8459f89b79208461e54b033b/lib/install.js#L551, it looks like we should be executing the following "magic" scripts in this order after a successful install for full compatibility:

1. build
2. install
3. postinstall
4. test IF npat flag is on
5. prepublish IF not a production build

I'm happy to pick this up, but how much parity do we want to implement with yarn? Should we add 1-3 and wrap prepublish in an if dev?